	US 12,075,810 B2
	Method of making a tobacco extract
Marina Sintyureva, London (GB)
Assigned to NICOVENTURES TRADING LIMITED, London (GB)
Appl. No. 16/614,274
Filed by NICOVENTURES TRADING LIMITED, London (GB)
PCT Filed May 9, 2018, PCT No. PCT/EP2018/062119 § 371(c)(1), (2) Date Nov. 15, 2019, PCT Pub. No. WO2018/210677, PCT Pub. Date Nov. 22, 2018.
Claims priority of application No. 1707761 (GB), filed on May 15, 2017.
Prior Publication US 2021/0153544 A1, May 27, 2021
Int. Cl. A24B 15/167 (2020.01); A24B 15/24 (2006.01); A24F 40/10 (2020.01); A24F 40/42 (2020.01); B01D 11/02 (2006.01)

CPC A24B 15/167 (2016.11) [A24B 15/24 (2013.01); A24F 40/10 (2020.01); A24F 40/42 (2020.01); B01D 11/0203 (2013.01); B01D 11/0215 (2013.01); B01D 11/0288 (2013.01); B01D 11/0292 (2013.01)]

16 Claims

1. A method of making a tobacco extract, the method comprising:

(a) providing tobacco and an entrapment solvent in a partitioned vessel, wherein the tobacco and entrapment solvent are separated by a partition, and the vessel is configured such that the tobacco and entrapment solvent cannot contact each other;

(b) flowing a supercritical extraction solvent into the vessel, wherein the extraction solvent and any dissolved substances can pass through the partition; whereby tobacco components are extracted from the tobacco into the extraction solvent and carried across the partition, wherein the extraction solvent contacts the entrapment solvent and the tobacco components are transferred from the extraction solvent into the entrapment solvent,

wherein the method further comprises the step of providing the entrapment solvent containing dissolved tobacco components in a cartridge, wherein the cartridge is configured for use in a smoking article.